Schematic for the LCFC NM-C421 motherboard, revision 1.0, used in Lenovo ThinkPad E14, R14, E15 and R15 models, with an AMD R19M-P25 discrete GPU variant listed, plus a 5070 token in the name. NM-series numbers come from LCFC, Lenovo's in-house ODM. Technicians use the drawings to follow power rails, check GPU power sequencing and read connector pinouts. The 4.87 MB RAR holds the document; verify the board marking and revision on the PCB before following it.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @schematicslaptop. Enginerys does not host this file.
All sources (6)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @schematicslaptop | 10 Apr 2022 | Open file on RM Schematics |
| @pepeelectronica | 26 Apr 2022 | Open file on RM Schematics |
| @cyberlanelectonik | 22 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 25 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 2 Aug 2026 | Open file on RM Schematics |
| @schematics_bios | 14 Aug 2026 | Open file on RM Schematics |
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.